I have inherited a commercial installation to maintain, installed by another company.
The system is comprised of 15- 311 receivers, 4- DP34 switches, and one 18" dual LNB(119/110) dish. On a hilltop, no trees around.
My BIG problem is, the receivers frequently intermittently fail. We find them with black screens, on channel 9600/9800, Dish500 screens, you name it. Sometimes we get a multi-dish switch failure message, where changing switch ports gets everything working. Normally resetting power restores operation, today operation returned after running a Check Switch, but it may have been because it was on channel 9XXX instead of 418. Usually 1-2 fail per week, sometimes more. Failure occurs in clear, rainy, & stormy weather.
This rack of 3 per shelf produces much heat in an already hot room, so we installed 5 fans to help cool each group of 3 stacked receivers. We also added taller rubber feet for greater spacing. We installed UPSs to power the receivers to rule-out power problems.
The signal levels are under 75% and that will be improved this week hopefully.
Could heat be causing this?
Are these receivers junk?
Is it from low signal levels?
Any suggestions appreciated.